Arapahoe County's estimated 2026 population is 671,880 with a growth rate of -0.29% in the past year according to the most recent United States census data. Arapahoe County is the 3rd largest county in Colorado. The 2010 population was 575,124 and has seen a growth of 16.82% since that time.
Data after 2023 is projected based on recent change
Overall: 37.3 years
Female: 38.3 years
Male: 36.4 years
There are 510,782 adults, (95,133 of whom are seniors) in Arapahoe County.
Female: 330,484 (50.1%)
Male: 329,360 (49.9%)
The racial composition of Arapahoe County includes 59.16% White, 10.91% Black or African American, 7.34% other race, 6.08% Asian, and smaller percentages for Native American, Native Hawaiian or Pacific Islander and multiracial populations.
Race | Population | Percentage (of total) |
|---|---|---|
| White | 390,363 | 59.16% |
| Two or more races | 100,228 | 15.19% |
| Black or African American | 71,991 | 10.91% |
| Other race | 48,407 | 7.34% |
| Asian | 40,139 | 6.08% |
| Native American | 6,769 | 1.03% |
| Native Hawaiian or Pacific Islander | 1,947 | 0.3% |
Arapahoe County's average per capita income is $60,534. Household income levels show a median of $101,087. The poverty rate stands at 8.64%.
Name | Median | Mean |
|---|---|---|
| Married Families | $144,498 | $183,671 |
| Families | $125,235 | $161,773 |
| Households | $101,087 | $136,289 |
| Non Families | $64,086 | $83,393 |
Average Income
Median Household Income
Poverty Rate
